| 摘要 |
PURPOSE: An air pump is provided to inject air into a boat or a tube conveniently by installing an auxiliary air pump between a board and a footplate, and to assemble and disassemble the air pump simply by inserting a spring for turning the footplate repeatedly. CONSTITUTION: An air injection hose is combined with discharge holes of an air pump and an auxiliary air pump, and connected to an air tube or an air boat. Compressed air from the air pump is injected into the air tube by opening a discharge check valve plate in pushing a footplate elastically stuck to a board. The footplate is restored by a spring repulsive unit(20), and the discharge check valve plate is closed in releasing the footplate. Air is injected into the air pump and the auxiliary air pump by opening an intake check valve plate of an intake hole to inject air into the air tube repeatedly. A large amount of pressure is required in pushing the footplate of the air pump by generating counterpressure at the end of air injection. The air is injected sufficiently into the air tube with pushing the footplate lightly by injecting air from the auxiliary air pump in separating the air injection hose connected to the intake hole of the air pump.
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